You can't predict if they will pair off or not. Just like people and other animals sometimes they just don't get along or sometimes they want to be just friends. The only way to know is to wait and see what happens. If you are not seeing much agression then it sounds like they are at least becoming friends. It could turn into more but might not. You just never know.
I have 2 clowns I am trying to pari up now. Mine are in a stage similar to yours. There is not much agression but they are not yet paired up. Since I am not seeing either one get beat up, I am just waiting and hoping.
If you want to be sure that you have a pair then you can return the ones you have and buy an already mated pair. You will occasionally see them for sale as pairs on some web sites. It just depends on if they have any already paired fish or not.